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885 decky 1
/*
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 * Copyright (C) 2005 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include "ofw.h"
1764 jermar 30
#include <printf.h>
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#include <asm.h>
885 decky 32
 
1764 jermar 33
#define MAX_OFW_ARGS        10
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#define BUF_SIZE        1024
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typedef unsigned int ofw_arg_t;
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typedef unsigned int ihandle;
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typedef unsigned int phandle;
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/** OpenFirmware command structure
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 *
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 */
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typedef struct {
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    const char *service;          /**< Command name */
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    unsigned int nargs;           /**< Number of in arguments */
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    unsigned int nret;            /**< Number of out arguments */
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    ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */
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} ofw_args_t;
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typedef void (*ofw_entry)(ofw_args_t *);
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1755 decky 53
typedef struct {
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    unsigned int info;
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    unsigned int addr_hi;
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    unsigned int addr_lo;
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} pci_addr_t;
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typedef struct {
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    pci_addr_t addr;
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    unsigned int size_hi;
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    unsigned int size_lo;
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} pci_reg_t;
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885 decky 66
ofw_entry ofw;
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phandle ofw_chosen;
1146 decky 69
ihandle ofw_stdout;
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phandle ofw_root;
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ihandle ofw_mmu;
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phandle ofw_memory;
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phandle ofw_aliases;
885 decky 74
 
1146 decky 75
static int ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...)
885 decky 76
{
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    va_list list;
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    ofw_args_t args;
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    int i;
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81
    args.service = service;
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    args.nargs = nargs;
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    args.nret = nret;
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1146 decky 85
    va_start(list, rets);
885 decky 86
    for (i = 0; i < nargs; i++)
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        args.args[i] = va_arg(list, ofw_arg_t);
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    va_end(list);
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90
    for (i = 0; i < nret; i++)
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        args.args[i + nargs] = 0;
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93
    ofw(&args);
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1146 decky 95
    for (i = 1; i < nret; i++)
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        rets[i - 1] = args.args[i + nargs];
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956 decky 98
    return args.args[nargs];
885 decky 99
}
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964 decky 102
static phandle ofw_find_device(const char *name)
953 decky 103
{
1146 decky 104
    return ofw_call("finddevice", 1, 1, NULL, name);
964 decky 105
}
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static int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen)
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{
1146 decky 110
    return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
964 decky 111
}
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1146 decky 113
 
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static unsigned int ofw_get_address_cells(const phandle device)
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{
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    unsigned int ret;
117
 
118
    if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
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        if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0)
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            ret = 1;
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122
    return ret;
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}
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static unsigned int ofw_get_size_cells(const phandle device)
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{
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    unsigned int ret;
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130
    if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
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        if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0)
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            ret = 1;
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    return ret;
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}
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964 decky 138
static ihandle ofw_open(const char *name)
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{
1146 decky 140
    return ofw_call("open", 1, 1, NULL, name);
953 decky 141
}
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964 decky 144
void init(void)
885 decky 145
{
964 decky 146
    ofw_chosen = ofw_find_device("/chosen");
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    if (ofw_chosen == -1)
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        halt();
885 decky 149
 
1146 decky 150
    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
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        ofw_stdout = 0;
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1146 decky 153
    ofw_root = ofw_find_device("/");
154
    if (ofw_root == -1) {
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        puts("\r\nError: Unable to find / device, halted.\r\n");
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        halt();
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    }
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1146 decky 159
    if (ofw_get_property(ofw_chosen, "mmu",  &ofw_mmu, sizeof(ofw_mmu)) <= 0) {
160
        puts("\r\nError: Unable to get mmu property, halted.\r\n");
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        halt();
162
    }
1146 decky 163
 
164
    ofw_memory = ofw_find_device("/memory");
165
    if (ofw_memory == -1) {
166
        puts("\r\nError: Unable to find /memory device, halted.\r\n");
167
        halt();
168
    }
169
 
170
    ofw_aliases = ofw_find_device("/aliases");
171
    if (ofw_aliases == -1) {
172
        puts("\r\nError: Unable to find /aliases device, halted.\r\n");
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        halt();
174
    }
885 decky 175
}
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964 decky 178
void ofw_write(const char *str, const int len)
885 decky 179
{
964 decky 180
    if (ofw_stdout == 0)
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        return;
182
 
1146 decky 183
    ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
885 decky 184
}
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void *ofw_translate(const void *virt)
885 decky 188
{
1146 decky 189
    ofw_arg_t result[3];
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191
    if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, virt, 1) != 0) {
192
        puts("Error: MMU method translate() failed, halting.\n");
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        halt();
194
    }
195
    return (void *) result[2];
885 decky 196
}
953 decky 197
 
198
 
1075 decky 199
int ofw_map(const void *phys, const void *virt, const int size, const int mode)
200
{
1146 decky 201
    return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys);
1075 decky 202
}
203
 
204
 
964 decky 205
int ofw_memmap(memmap_t *map)
206
{
1146 decky 207
    unsigned int buf[BUF_SIZE];
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    int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(unsigned int) * BUF_SIZE);
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    if (ret <= 0)
964 decky 210
        return false;
1146 decky 211
 
212
    unsigned int ac = ofw_get_address_cells(ofw_memory);
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    unsigned int sc = ofw_get_size_cells(ofw_memory);
964 decky 214
 
1146 decky 215
    int pos;
964 decky 216
    map->total = 0;
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    map->count = 0;
1146 decky 218
    for (pos = 0; (pos < ret / sizeof(unsigned int)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
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        void * start = (void *) buf[pos + ac - 1];
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        unsigned int size = buf[pos + ac + sc - 1];
221
 
222
        if (size > 0) {
223
            map->zones[map->count].start = start;
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            map->zones[map->count].size = size;
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            map->count++;
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            map->total += size;
227
        }
964 decky 228
    }
229
}
1130 decky 230
 
231
 
232
int ofw_screen(screen_t *screen)
233
{
1146 decky 234
    char device_name[BUF_SIZE];
1130 decky 235
 
1146 decky 236
    if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(char) * BUF_SIZE) <= 0)
1130 decky 237
        return false;
238
 
239
    phandle device = ofw_find_device(device_name);
240
    if (device == -1)
241
        return false;
242
 
243
    if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0)
244
        return false;
245
 
246
    if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0)
247
        return false;
248
 
249
    if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0)
250
        return false;
251
 
252
    if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0)
253
        return false;
254
 
255
    if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0)
256
        return false;
257
 
258
    return true;
259
}
1620 decky 260
 
261
 
262
int ofw_keyboard(keyboard_t *keyboard)
263
{
264
    char device_name[BUF_SIZE];
265
 
266
    if (ofw_get_property(ofw_aliases, "macio", device_name, sizeof(char) * BUF_SIZE) <= 0)
267
        return false;
268
 
269
    phandle device = ofw_find_device(device_name);
270
    if (device == -1)
271
        return false;
272
 
1755 decky 273
    pci_reg_t macio;
274
    if (ofw_get_property(device, "assigned-addresses", &macio, sizeof(macio)) <= 0)
275
        return false;
1620 decky 276
 
1755 decky 277
    keyboard->addr = (void *) macio.addr.addr_lo;
278
    keyboard->size = macio.size_lo;
279
 
1620 decky 280
    return true;
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}